#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
using namespace std;

int main()
{

	//cout << 495 * pow(3, 4) * pow(2, 8) / pow(5.0, 12);
	//cout << 12 * pow(3, 11) * pow(2, 1) / pow(5.0, 12);
	//cout << 1 - 0.0195;
	//cout << 0.9*0.8*0.6;
	//cout << 1-0.1*0.2*0.4;
	//cout << 0.048+0.108+0.288;
	//cout << 0.98*0.9+0.1*0.1;
	//cout << 0.1*0.1/0.892;
	cout << 10*pow(0.892,9)*pow(1-0.892,1)+pow(0.892,10);
	return 0;
}